WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT DECEMBER 31, 1998 AND THE STATEMENT OF OPERATIONS FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS ANNUAL REPORT ON FORM 10-K FOR THE
PERIOD DECEMBER 31, 1998.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                         653,851
<SECURITIES>                                         0
<RECEIVABLES>                                  199,488
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               853,339
<PP&E>                                      16,545,596
<DEPRECIATION>                               8,048,301
<TOTAL-ASSETS>                               9,350,634
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                   9,350,634
<TOTAL-LIABILITY-AND-EQUITY>                 9,350,634
<SALES>                                              0
<TOTAL-REVENUES>                             1,327,862
<CGS>                                                0
<TOTAL-COSTS>                                1,042,439
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   217,407
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT SEPTEMBER 30, 1998 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE
QUARTERLY PERIOD ENDED SEPTEMBER 30, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDING AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD ENDING SEPTEMBER 30, 1998.
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   9-MOS
[FISCAL-YEAR-END]                          DEC-31-1998
[PERIOD-START]                             JAN-01-1998
[PERIOD-END]                               SEP-30-1998
[CASH]                                         605,930
[SECURITIES]                                         0
[RECEIVABLES]                                  262,345
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                               868,275
[PP&E]                                      16,826,673
[DEPRECIATION]                               7,941,953
[TOTAL-ASSETS]                               9,752,995
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                   9,752,995
[TOTAL-LIABILITY-AND-EQUITY]                 9,752,995
[SALES]                                              0
[TOTAL-REVENUES]                             1,028,400
[CGS]                                                0
[TOTAL-COSTS]                                  782,754
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   223,192
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT JUNE 30, 1998 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE
QUARTERLY PERIOD ENDED JUNE 30, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD JUNE 30, 1998.
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   6-MOS
[FISCAL-YEAR-END]                          DEC-31-1998
[PERIOD-START]                             JAN-01-1998
[PERIOD-END]                               JUN-30-1998
[CASH]                                         672,468
[SECURITIES]                                         0
[RECEIVABLES]                                  270,540
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                               943,008
[PP&E]                                      16,983,984
[DEPRECIATION]                               7,768,973
[TOTAL-ASSETS]                              10,158,019
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                  10,158,019
[TOTAL-LIABILITY-AND-EQUITY]                10,158,019
[SALES]                                              0
[TOTAL-REVENUES]                               689,448
[CGS]                                                0
[TOTAL-COSTS]                                  520,804
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   157,485
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT MARCH 31, 1998 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE
QUARTERLY PERIOD ENDED MARCH 31, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD MARCH 31, 1998.
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   3-MOS
[FISCAL-YEAR-END]                          DEC-31-1998
[PERIOD-START]                             JAN-01-1998
[PERIOD-END]                               MAR-31-1998
[CASH]                                         651,131
[SECURITIES]                                         0
[RECEIVABLES]                                  285,561
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                               936,692
[PP&E]                                      17,121,582
[DEPRECIATION]                               7,584,377
[TOTAL-ASSETS]                              10,473,897
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                  10,473,897
[TOTAL-LIABILITY-AND-EQUITY]                10,473,897
[SALES]                                              0
[TOTAL-REVENUES]                               332,880
[CGS]                                                0
[TOTAL-COSTS]                                  263,224
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                    63,245
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT DECEMBER 31, 1997 AND THE STATEMENT OF OPERATIONS FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS ANNUAL REPORT ON FORM 10-K FOR THE
PERIOD ENDED DECEMBER 31, 1997.
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   12-MOS
[FISCAL-YEAR-END]                          DEC-31-1997
[PERIOD-START]                             JAN-01-1997
[PERIOD-END]                               DEC-31-1997
[CASH]                                         714,528
[SECURITIES]                                         0
[RECEIVABLES]                                  247,992
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                               962,520
[PP&E]                                      17,249,260
[DEPRECIATION]                               7,391,011
[TOTAL-ASSETS]                              10,820,769
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                  10,820,769
[TOTAL-LIABILITY-AND-EQUITY]                10,820,769
[SALES]                                              0
[TOTAL-REVENUES]                             1,338,664
[CGS]                                                0
[TOTAL-COSTS]                                1,066,522
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   287,731
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT MARCH 31, 1997 (UNAUDITED), JUNE 30, 1997 (UNAUDITED) AND SEPTEMBER
SEPTEMBER 30, 1997 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE QUARTERLY
PERIOD ENDED MARCH 31, 1997 (UNAUDITED), JUNE 30, 1997 (UNAUDITED) AND SEPTEMBER
30, 1997 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH 
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS QUARTERLY REPORT ON FORM 10-Q FOR
THE PERIOD ENDED MARCH 30, 1997, JUNE 30, 1997 AND SEPTEMBER 30, 1997.
[/LEGEND]
       
<S>                             <C>                     <C>                     <C>
[PERIOD-TYPE]                   3-MOS                   6-MOS                   9-MOS
[FISCAL-YEAR-END]                          DEC-31-1997             DEC-31-1997             DEC-31-1997
[PERIOD-START]                             JAN-01-1997             JAN-01-1997             JAN-01-1997
[PERIOD-END]                               MAR-31-1997             JUN-30-1997             SEP-30-1997
[CASH]                                         658,115                 663,656                 697,143
[SECURITIES]                                         0                       0                       0
[RECEIVABLES]                                  341,736                 340,972                 353,985
[ALLOWANCES]                                         0                       0                       0
[INVENTORY]                                          0                       0                       0
[CURRENT-ASSETS]                               999,851               1,004,629               1,051,128
[PP&E]                                      17,562,734              17,471,632              17,318,635
[DEPRECIATION]                               6,764,460               6,982,364               7,169,395
[TOTAL-ASSETS]                              11,798,125              11,493,896              11,200,368
[CURRENT-LIABILITIES]                                0                       0                       0
[BONDS]                                              0                       0                       0
[PREFERRED-MANDATORY]                                0                       0                       0
[PREFERRED]                                          0                       0                       0
[COMMON]                                             0                       0                       0
[OTHER-SE]                                  11,798,125              11,493,896              11,200,368
[TOTAL-LIABILITY-AND-EQUITY]                11,798,125              11,493,896              11,200,368
[SALES]                                              0                       0                       0
[TOTAL-REVENUES]                               329,422                 685,260               1,040,031
[CGS]                                                0                       0                       0
[TOTAL-COSTS]                                  264,904                 531,729                 796,068
[OTHER-EXPENSES]                                     0                       0                       0
[LOSS-PROVISION]                                     0                       0                       0
[INTEREST-EXPENSE]                                   0                       0                       0
[INCOME-PRETAX]                                 83,744                       0                       0
[INCOME-TAX]                                         0                       0                       0
[INCOME-CONTINUING]                                  0                       0                       0
[DISCONTINUED]                                       0                       0                       0
[EXTRAORDINARY]                                      0                       0                       0
[CHANGES]                                            0                       0                       0
[NET-INCOME]                                    83,744                 152,876                 257,213
[EPS-PRIMARY]                                        0                       0                       0
[EPS-DILUTED]                                        0                       0                       0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHET AT DECEMBER 31, 1996 AND THE STATEMENT OF OPERATIONS FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS ANNUAL REPORT ON FORM 10-K FOR THE
PERIOD ENDED DECEMBER 31, 1996
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   12-MOS
[FISCAL-YEAR-END]                          DEC-31-1996
[PERIOD-START]                             JAN-01-1996
[PERIOD-END]                               DEC-31-1996
[CASH]                                         642,886
[SECURITIES]                                         0
[RECEIVABLES]                                  389,210
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                             1,032,096
[PP&E]                                      17,587,240
[DEPRECIATION]                               6,519,342
[TOTAL-ASSETS]                              12,099,994
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                  12,099,994
[TOTAL-LIABILITY-AND-EQUITY]                12,099,994
[SALES]                                              0
[TOTAL-REVENUES]                             1,648,740
[CGS]                                                0
[TOTAL-COSTS]                                1,062,825
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   647,151
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT MARCH 31, 1996, JUNE 30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND
THE STATEMENTS OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1996, JUNE
30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS QUARTERLY REPORT
ON FORM 10-Q FOR THE RESPECTIVE PERIODS THEN ENDED.
[/LEGEND]
       
<S>                             <C>                     <C>                     <C>
[PERIOD-TYPE]                   3-MOS                   6-MOS                   9-MOS
[FISCAL-YEAR-END]                          DEC-31-1996             DEC-31-1996             DEC-31-1996
[PERIOD-START]                             JAN-01-1996             JAN-01-1996             JAN-01-1996
[PERIOD-END]                               MAR-31-1996             JUN-30-1996             SEP-30-1996
[CASH]                                         795,560                 737,833                 691,302
[SECURITIES]                                         0                       0                       0
[RECEIVABLES]                                  475,894                 439,561                 414,819
[ALLOWANCES]                                         0                       0                       0
[INVENTORY]                                          0                       0                       0
[CURRENT-ASSETS]                             1,271,454               1,177,394               1,106,121
[PP&E]                                      17,620,649              17,603,998              17,629,317
[DEPRECIATION]                               5,788,713               6,035,713               6,280,263
[TOTAL-ASSETS]                              13,103,390              12,745,679              12,455,175
[CURRENT-LIABILITIES]                                0                       0                       0
[BONDS]                                              0                       0                       0
[PREFERRED-MANDATORY]                                0                       0                       0
[PREFERRED]                                          0                       0                       0
[COMMON]                                             0                       0                       0
[OTHER-SE]                                  13,103,390              12,745,679              12,455,175
[TOTAL-LIABILITY-AND-EQUITY]                13,103,390              12,745,679              12,455,175
[SALES]                                              0                       0                       0
[TOTAL-REVENUES]                               465,267                 873,492               1,295,796
[CGS]                                                0                       0                       0
[TOTAL-COSTS]                                  266,190                 532,283                 800,164
[OTHER-EXPENSES]                                     0                       0                       0
[LOSS-PROVISION]                                     0                       0                       0
[INTEREST-EXPENSE]                                   0                       0                       0
[INCOME-PRETAX]                                      0                       0                       0
[INCOME-TAX]                                         0                       0                       0
[INCOME-CONTINUING]                                  0                       0                       0
[DISCONTINUED]                                       0                       0                       0
[EXTRAORDINARY]                                      0                       0                       0
[CHANGES]                                            0                       0                       0
[NET-INCOME]                                   211,265                 369,426                 540,627
[EPS-PRIMARY]                                        0                       0                       0
[EPS-DILUTED]                                        0                       0                       0
        

</TABLE>